detect

verb

de·​tect di-ˈtekt How to pronounce detect (audio)
dē-
detected; detecting; detects
Synonyms of detectnext

transitive verb

1
: to discover the true character of
detecting drug smugglers
2
: to discover or determine the existence, presence, or fact of
detect alcohol in the blood
Do I detect a note of sarcasm in your voice?
3

intransitive verb

: to work as a detective
detectability noun
detectable adjective

Examples of detect in a Sentence

The test is used to detect the presence of alcohol in the blood. This type of cancer is difficult to detect in its early stages.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Seismometers, such as the ones placed on the moon’s near side during the Apollo era, will be left at the south pole to determine whether moonquakes can be detected on the far side. Ashley Strickland, CNN Money, 21 Feb. 2026 Raman spectroscopy scanned multiple points across the film to detect structural damage. Rupendra Brahambhatt, Interesting Engineering, 21 Feb. 2026 As bassist Ian Hill points out, since the alleged (and in fact non-existent) messages were subliminal, they were being asked to prove that something which couldn’t be detected wasn’t there. Catherine Bray, Variety, 20 Feb. 2026 Artificial intelligence may help medics detect sepsis earlier. Harriet Marsden, TheWeek, 20 Feb. 2026 See All Example Sentences for detect

Word History

Etymology

Middle English, from Latin detectus, past participle of detegere to uncover, detect, from de- + tegere to cover — more at thatch

First Known Use

1574, in the meaning defined at transitive sense 1

Time Traveler
The first known use of detect was in 1574

Browse Nearby Words

Cite this Entry

“Detect.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/detect. Accessed 21 Feb. 2026.

Kids Definition

detect

verb
de·​tect di-ˈtekt How to pronounce detect (audio)
: to discover the nature, existence, presence, or fact of
detect the approach of an airplane
detectable adjective
detection
-ˈtek-shən
noun

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